Mountain-building processes

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Plate Tectonics Mountain building processes
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CE - Mountain-building processes
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S2 - The unstable earth
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Mountain-building Vs Unstable earth
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The unstable earth
What makes up the earths crust
Where are the unstable zones on the earth?
Why does the crust move?
What are the causes of volcanic eruptions
earthquakes?
Volcanic eruptions
Fold mountains
Earthquakes
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What makes up the earths crust?

• The earth is made up of 3 layers

• The earths crust is made up of __________ and
  __________. They form the __________ and
  __________ floors.

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Where are the unstable zones on the earth?

• There are 3 major zones of earthquakes and
  volcanic activities

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Why does the crust move?

• The earths crust is made up of __________.
• Name the plates marked 1 to 7 in the map below.

plates
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Why does the crust move?

• The plates are moving very slowly along
  _________________.

plate boundaries
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Why does the crust move?

• The movement of plates is caused by the
  _______________ of magma in the mantle.

convection
Destructive plate boundary
Two plates move __________ each other
towards
Constructive plate boundary
Plates move __________
apart
magma
Convection of __________

• This process is explained in the theory of
  _________________.

plate tectonics
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What are the causes of volcanic eruptions?
Hot __________, volcanic __________ and
__________ are thrown out to the earth surface.
When there is a line of __________ in the earths
crust, magma escapes to the surface from the
mantle.
weakness
eruption
This is called volcanic __________.
Magma
__________ in the mantle is under great heat and
high pressure.
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What are the causes of earthquakes?
The earth will shake. This is called
_______________.
earthquake
The plates will break and __________ is released.
energy
When the plates move, __________ builds up in
them.
pressure
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What are the harmful effects of earthquakes?
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How to reduce the negative impact of earthquakes?
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What are fold mountains?
The rocks may be folded up into high mountains.
They are known as __________ mountains.
fold
When plates move together, some rocks in between
are compressed and bent. This is called
__________.
folding
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Where are the fold mountains?

1. Name the fold mountains 1 to 4.
2. Fold mountains are usually found at
   _______________.

plate boundaries
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How are fold mountains formed?
The weight changes them into __________.
rocks
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How are fold mountains formed?
The rocks are folded up into high __________
mountains.
fold
The fold mountain formed here is the ____________.
Himalayas
plate
The rocks in between are compressed by
__________ movement.